backstab vs con

backstab

verb
  • to attack someone (especially verbally) unfairly in a deceitful, underhand, or treacherous manner, especially when they're not present in the place or situation that it happens. (as if stabbing them in the back). See backbite. 

con

verb
  • To trick or defraud, usually for personal gain. 

  • To study or examine carefully, especially in order to gain knowledge of; to learn, or learn by heart. 

noun
  • The conversion of part of a building. 

  • A fraud; something carried out with the intention of deceiving, usually for personal, often illegal, gain. 

  • An organized gathering, such as a convention, conference, or congress. 

  • A convicted criminal, a convict. 

  • A disadvantage of something, especially when contrasted with its advantages (pros). 

  • A political conservative. 

How often have the words backstab and con occurred in a corpus of books? (source: Google Ngram Viewer )